Valve for refrigerating systems



. R. w w 1, m w m 6 v. 1 0 Y B G F KNOX VALVE FOR REFRIGERATING SYSTEMS v Filed Jan. 7, 1924 Feb. 1 1927.

mama Feb. 1. 1921.

type, ammonia gas is frezingwater, which is placed UNITED STATES'PATENT' orrica.

"ea-ones r. Knox or MILWAUKEE,- wisoou m.

vanva roa nnrmenaa'rmes xssr'nus.

Application filed January 7, 1924. Serial 80. 884,899.

pipe, which extends through water.main-' tamed at as low a temperature as is practicable. This water naturallyv becomes warm as it absorbsthe heat from the ammonia, and eventually becomes too warm to act as a cooling agent for the gas, whereupon it is necessary to discharge the water and to admit fresh cold water.

The valve constituting the present invention is especially ada ted for controlling the discharge of this coo ing water from thecooling chamber, and is preferably of the thermostatically controlled type, in order that its operation may be automatic.

ignate like partsin all the view of a valve constructed in accordance with-the resent'mventron, also showing a I-Fig. 2 parts shown in Fig. 2, as seenfrom the left of the said-figure;

The primary object of the invention, therefore, is to provide a thermostatically controlledvalve, especially adapted for controlling the outlet of the cooling chamber of a refrigerating plant, which valve will be simple in construction, comparatively inexpensive to manufacture, install and maintain, and more eiiicient in action than those which havebeen heretofore proposed.

With the above and other objects in view, which will appear as the description proceeds, the invention consists in the novel details of construction and combination and arrangements of arts, more fully hereinafter disclosed an particularly. pointed out in the appended claims.

Beferrin to the accompanying drawings in which like reference characters desviews;

1 is a central vertical sectional Figure the operating sol noid;

portion 0 I is an end elevational .view of the an 'elevational view of the Fig. 3. is

'Qvalve shown in Figs. 1 and 2, the solenoid receive being omitted and the cap member closin one end-of the valve, casing being omitte to show the interior of the said casing; and, Fig. 4 is a view similar to Fig. 3, but looking in the opposite direction, and showin the interior ofthe cap which was omitte k in Fig. 3.

Referrin more particularly to the said drawin 's, t e numeral 5 indicates a suitable solenoi having a'windin reciprocating core 7, slidalidy mounted in the 6 and the usual end plate 8 with. which the solenoid is provided. Suitably secured to the said end plate 8 is alcsisting 9, constituting a support for theval've, and extending upwardly as indi cated at 10, to form a cap or closure member for one end of the valve casin 11, the other end of which is adapted to e closed by a suitable cap .12, as Wlll. be clear from the drawings. The said valve casingll is provided witlithe inwardly extending ana nular flanges 13 and 14, see Fig. 1, while the member 10is provided with a flange 15, and the member 12 is provided with a flange 16.

interposed between the said flan es, 1 3:

and 15, is a diaphragm 17 of suita le re-- s'ilienc while interposed between the flan es 13 an 16 is asecond diaphragm 18 0th e construction The diaphragms, 17 and 18, are spaced substantially as shown in Fig. 1, by the saids 7 flanges, and interposed between the said diephragms is a sheet metal sleeve 19, the ends of which are flanged outwardly as indicated at 20, which flanges are in turn bent back toward each other, as indicated at 21, form-v ing bearing surfaces adapted to en age the inner surfaces of the flan es 'l3 an 14.-

A pair of washer or er members, 22 and 23, are

and the member 22 carries 18, respectively,

bolt 24, threaded ositioned within the sleeve member 19, ad acent the diaphragms 17 and T --ioo e' the member 23 has threaded also carries a locking nut 26, as will be clear T from Fig. 1..

The said valve stem 25 is also slidably mounted in a spider member 27, which is threaded or otherwise removably mounted in the cap member 12, which '0 p member is provided with the valve seat 8, adaptedto the valve 29, carried by the valve stem 25,-as willbe readily. understood. The said valve controls the; outlet passage 30,

from the valve casing, which casing is also provided with an inlet passage 31, communicating by means of the transverse passage 32, with the chambers,

in the hollow caps, and 12,'as will be clear from Fig. 1. The diaphragms, 17 and 18, are perforated in alignment with the as- .sage 32, as indicated at 35 and 36 res ectivev ly, to permit the flow of water from t e pas- 10 sage 32 to the chambers 33 and 34.

The lower part of the casing 11 is provided with a slot 38, throu one end 39 of a lever 40, WlllCl'l is pivoted as at 41 to -the ears 42 with which the valve 15 casing is provided, see Figs. .1, 2 and 3, and

' the lower end '43 of-the said lever extends downwardly to enga e the slot 44, provided in the stud 45', carrie by the solenold core. 7.

In operation the inlet opening 31 is con- 'nected to the cooling chamber of the refrigeratin system, which chamber also contains a suita 1e thermostat, not shown, electrically connected to the solenoid 5. When the water within the cooling chamber becomes too warm, the thermostat will act to close the solenoid circuit, whereupon the core of the solenoid will be moved toward the left,

as-viewed in Fig. 1, and through its lever connection40, will tend to move the dia- 3 phragms, 17-and, 18 the valve stem 25 and valve 29, toward the right, as viewed in the said figure, thereby unseating thevalve and ermitting the water from the cooling cham er to flow through the passage 32 to v 35 the chamber 34, and thence past the valve to the outlet opening 30, from whence it may be discharged at any suitable place by piping not shown. l

- When the temperature of the water with- 40 in, the cooling chamber has been reduced by the introduction of fresh cold water, to the point where .the thermostat willbreakthe solenoid circuit, the resilience of the diaphragms, 17 and 18,will cause 'thevalve29 to be unseated, the solenoid core 7 moving toward the right, as viewed in Fig. 1. If

desired, a suitable spring may be associated with the solenoid core to assist in the seating of the valve. It will be noted that water is admitted to .opposite sides of thediaphra ms, 17 and 18, thereby producing a normally alanced valve, and the closing movements of the valve are therefore due solely to the resilience of the diaphragms or if the auxiliary spring, above mentioned, be employed, to this actionalso.

\ While one form-of theinvention has been illustrated and described it is obvious that, thoseskilled in the art may vary the details of construction aslwell. as the arrangement of parts without departing fromthe spirit of the invention, and therefore it is not if wished to belimited to the-above disclosure- 33' and 34, provided gh which passes mounted in said casing;

,casing; a spacing sleeve said slidably mounted in said passing into said sleeve;

except as may ing claims.

"What is claimed is: r

a valve of the class described, a casing provided with a pair of hollow caps closing its ends one of with a valve seat; a diaphragm interposed between said casing and each of said caps; a valve carried by said diaphragms coacting with said seat; a between said diaphrag1ns and slidably and means for movmg sald diaphragms and valve to unseat the latter.

2. In a valve of theclass described, a casing provided with an inlet opening and a transverse passage; a' pair of hollow caps closmg the ends of said casing, one of which is provldedwith an outlet opening having a valve seat; a diaphragm having an aperture registering with said passage, interposed between each of said caps and said slidably mounted'in caslng between said diaphragms; a valve carried by said diaphragms coacting with said seat; and means adapted to be thermostatically controlled for moving said valve. v 3. In valve of the class described, a casmg provlded with an inlet 0 ening and a transverse passage a pair oi. hollow caps closingthe ends of said casing one of which is provided with an outlet opening having avalve's eat; a diaphragm having an aperture registering with said passage, inter.- posed between each of said caps and said casmg'; a spacing sleeve having end flanges casing and secured between said diaphragms; a valve carried by said diaphragms coacting with said seat; and means adapted to controlled for moving said valve.

be required by the accompanywhich caps is provided spacing member interposed be thermostatically I 4. In a valve of the class described, a cassald diaphragms and provided with out- .turne'd end flanges slidably mounted in said casing; a valve .provided with a valve stem adfu'stablylcarried by one of said diaphragms and adapted to coact with said valve seat; a lever pivotally carried by said *casing and electro-magnetic means for moving said lever.

. In testim ture.

. GEORGE F. KNOX.

casmg; a spacing sleeve secured between 11y whereof, I aflix mysigna-" 

